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Issue 5, 2014
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A flexible, porous, cluster-based Zn-pyrazolate-dicarboxylate framework showing selective adsorption properties

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Abstract

A flexible Zn-pyrazolate-carboxylate framework [Zn7O2(deppy)2(oba)4]·2.5DMF·2H2O (1) (Hdeppy = 3,5-diethyl-4-(4′-pyridyl)pyrazole, H2oba = 4,4′-oxobisbenzoic acid) was synthesized by solvothermal reaction. Single-crystal X-ray diffraction indicated that 1 possesses a 10-connected bct topological network based on a rare heptanuclear zinc(II) cluster. Comparison of crystal structures of 1 determined at 300 K and 150 K illustrated the conformational flexibility of deppy ligands. Thermogravimetry analyses and powder X-ray diffraction measurements showed that 1 has high thermal stability and good water stability. Gas and liquid sorption experiments of 1 not only showed stronger adsorption of CO2 compared with N2, but also demonstrated highly efficient separation of n-propylbenzene from other C9H12 alkylbenzene isomers 1,2,4-trimethylbenzene and 1,3,5-trimethylbenzene.

Graphical abstract: A flexible, porous, cluster-based Zn-pyrazolate-dicarboxylate framework showing selective adsorption properties

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Supplementary files

Article information


Submitted
11 Aug 2013
Accepted
12 Nov 2013
First published
12 Nov 2013

New J. Chem., 2014,38, 2002-2007
Article type
Paper

A flexible, porous, cluster-based Zn-pyrazolate-dicarboxylate framework showing selective adsorption properties

K. Chen, C. He, P. Liao, Y. Wei, P. Zhang, W. Xue, W. Zhang, J. Zhang and X. Chen, New J. Chem., 2014, 38, 2002
DOI: 10.1039/C3NJ00918A

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